Questions on the reading

1. I understand that there is a main point or a thesis of a passage but with sound being added to the passage, the thesis and main point tends to change. Why is it that sound controls the meaning of a passage?

2. If you were given an opportunity to listen to a book for class (audio book) instead of reading it for yourself, would you? Why?

3. Is there a significant change in the tone of a passage with and without sound? Does it change?